Pilgrims Prevented from Completing the Pilgrimmage

Bukhari :: Book 3 :: Volume 28 :: Hadith 42

Narrated Ka'b bin 'Umra:

Allah's Apostle stood beside me at Al-Hudaibiya and the lice
were falling from my head in great number. He asked me, "Have your
lice troubled you?" I replied in the affirmative. He ordered me to
get my head shaved. Ka'b added, "This Holy Verse:--'And if any of
you is ill, or has ailment in his scalp (2.196), etc. was revealed
regarding me. "The Prophet then ordered me either to fast three
days, or to feed six poor persons with one Faraq (three Sas) (of
dates), or to slaughter a sheep, etc (sacrifice) whatever was
available.